14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Fractal Characterization of Spanish Fricatives

Santiago Fernández, Sergio Feijóo, Ramón Balsa

Department of Applied Physics, University of Santiago de Compostela, Spain

In this paper, the fractal characterization of the Spanish fricatives is studied. Fractal models seem to be specially suitable for their characterization because turbulence, which is the sound source of the fricatives, has at least some aspects that are fractal. The fractal characterization was computed over a large database that had been previously characterized, both perceptually and acoustically. A linear discriminant analysis procedure was applied to the fractal representation and the classification rate attained was 85.2 %. The a posteriori probabilities resulting from the classification procedure were correlated with the responses of the perceptual characterization given a Pearson coefficient of 0.86. These results are comparable to other classical acoustic characterizations of fricative noises, such as filter band spectra or FFT-derived mel cepstral coefficients.

Full Paper

Bibliographic reference.  Fernández, Santiago / Feijóo, Sergio / Balsa, Ramón (1999): "Fractal characterization of Spanish fricatives", In ICPhS-14, 2145-2148.